TW, Afrizal. Adjusting the Concept of the Validity of Worship in the Terminology of the Ushuliyyin. Journal of Islamic Sciences, New Mexico, United States, v. 5, n. 3, p. 101–124, 2022. DOI: 10.26389/AJSRP.F030322. Disponível em: https://www.ajsrp.ojsexpert.com/index.php/jis/article/view/5239. Acesso em: 20 dec. 2025.